home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.physics:21589 alt.sci.physics.new-theories:2587
- Newsgroups: sci.physics,alt.sci.physics.new-theories
- Path: sparky!uunet!well!sarfatti
- From: sarfatti@well.sf.ca.us (Jack Sarfatti)
- Subject: Feynman 41 zero-point atomic Lamb shift
- Message-ID: <BzoDsL.q2@well.sf.ca.us>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- Date: Tue, 22 Dec 1992 19:21:57 GMT
- Lines: 141
-
-
- Remember, the purpose of these "lectures" is to review the essentials of
- Feynman's pictures of the world so that we can more intelligently evaluate
- Hal Puthoff's proposals for zero-point energy engines and my proposals for
- quantum connection communication devices - recall there are two possible
- classes of ftl communication devices
- 1. those requiring a new kind of quantum mechanics that relaxes the full
- unitarity constraint to "diagonal" unitarity which is sufficient to
- conserve the sum of probabilities for local measurements. Such a new
- quantum mechanics (like non-Euclidean geometry compared to Euclidean
- geometry) does not require tapping zero point energy to get quantum
- connection communication - however, Lyle Fuller has shown that quantum
- connection communication, if it exists, will induce extraction of energy
- from the vacuum in order to obey the Kip Thorne-Igor Novikov "global self-
- consistency" conditions on traversable wormhole time machines to the past.
- The question is will a simple polarization sensitive interferometer with a
- half-wave plate in one path implement the non-unitary extension of
- conventional quantum mechanics - or is some new phenonomenon -perhaps vital
- to living matter far from thermal equilibrium involved - a kind of PK
- effect?
-
- 2. those that retain full unitarity but use something like the Puthoff
- Casimir pinch effect in which the apparent violation of unitarity required
- in quantum connection communication is the result of opening new channels
- from the induced vacuum phase transition.
-
- Feynman 41 QED & renormalization Part III Lamb Shift
- "... in a closed system all quanta can be considered as virtual (i.e. they
- have a known source and are eventually absorbed) ...
-
- K1(3,4;1,2)=-ie^2S^2[K+a(3,5)K+b(4,6)GauGbuD+(s56^2)K+a(5,1)K+b(6,2)d5d6]
- (4)
-
- (4) can be rewritten as describing the action on a,
-
- K1(3,1) = iS[K+(3,5)A(5)K+(5,1)d5
-
- of the potential
-
- A(5) = e^2S[K+(4,6)D+(s56^2)GK+(6,2)d6] arising from Maxwell's equations
-
- -WAVE A = 4pij from a current
-
- j(6) = (e^2)K+(4,6)GK+(6,2)"
-
- I note that the local current j(6) is actually nonlocal in that it depends
- also on events 4 and 3 which are in future and past of it!
-
- "This is in virtue of the fact that
-
- -WAVE D+(s21^2) - 4piDirac(2,1) (5)
-
- .. our primary concern here will be for processes in which the quanta are
- virtual ...
-
- ... the amplitude that an electron in going from 1 to 2 absorbs a quantum
- whose vector potential .. is ce^-ikx = C(x) is
-
- K1+(2,1) = -iS[K0+(2,3)C(3)K0+(3,1)d3]
-
- (Like the exclusion principle) The Bose statistics of the quanta can , in
- all cases, be disregarded in intermediate states. The only effect of the
- statistics is to change the weight of initial or final states. If there are
- among quanta, in the initial state, some n which are identical then the
- weight of the state is 1/n! of what it would be if these quanta were
- considered as different (similarly for the final state).
-
- 3. The self-energy problem
- ... the interaction of the charge with itself ... to first order in e^2"
-
- *I will be loosely paraphrasing from now on - important details in original
- papers in Schwinger's reprint collection (Dover books).*
-
- / 2
- /
- / K0+(2,4)
- /
- /
- |\ 4
- | \
- | \
- K0+(4,3) | \ D+(s43^2)
- | /
- | /
- |/
- / 3
- /
- / K0+(3,1)
- /
- / 1
-
- this self-energy Feynman diagram in space-time has the intuitively obvious
- formula
-
- K1(2,1) = (-ie^2)S^2[K0+(2,4)GK0+(4,3)GK0+(3,1)d3d4D+(s43^2)]
-
- / 2
- / 2
- / p
- /
- /
- |\ 4
- | \
- | \
- p-k | \ k^-2
- | /
- | /
- |/
- / 3
- /
- / p
- /
- / 1
-
- the same diagram Fourier transformed to momentum-energy space which comes
- from assuming that initially we have electron in state f(1) a free-particle
- plane wave and similarly for final state g(2) "a change in energy dE1 ll
- the amplitude for arrival in f (spinor part u) at t2 is altered by a factor
- e^-idE1(t2-t1) ...
-
- dE1 = (e^2)S[(uGK0+(4,3)Gu)e^ipx43D+(s43^2)d4]
-
- note there is no d3 integral - the reason is tricky and is artifact of
- normalization scheme (u*u) = 1 * is ordinary c.c. not adjoint) described
- by Feynman in detail in original .. (u*u) = (E/m)(uadju)) the # integration
- gives a VT factor in the normalization,
-
- "One can likewise obtain an expresion for the energy (Lamb) shift for an
- electron in a hydrogen atom. Simply replace K0+ by K+V the exact kernel for
- electron in V =e^2/r and f by " a bound state...
-
- For the first order correction to the electron Lamb shift in hydrogen due
- to a single virtual "zero point vacuum" photon self-energy diagram "the de1
- that results is not real. The imaginary part is negative and in e^-idE1T
- produces an exponentially decreasing amplitude with time. This is because
- we are asking for the amplitude that an atom initially with no photon in
- the field, will still appear after time T with no photon. If the atom is in
- a state that can radiate, this amplitude must decay with time. The
- imaginary part of dE1 when calculated does indeed give the correct rate of
- radiation from atomic states. It is zero for the ground state and for a
- free electron. ....
-